Re: We can meet all our needs through space development

On Jan 30, 9:44 am, Ian Parker <ianpark...@xxxxxxxxx> wrote:
On 30 Jan, 12:18, Einar <eina...@xxxxxxxxx> wrote:



On Jan 29, 2:13 pm, "Mike Combs"

<mikeco...@xxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
"Einar" <eina...@xxxxxxxxx> wrote in message

news:b8db2464-6d7e-47c1-b641-870a89468e4e@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

This sounds more like one would hope that the world at 2099
might be like.

Write a schy fy book on this, a suggestion.

It will most certainly remain a very-distant science-fiction-y concept for
as long as we choose to view it as such.

--

Regards,
Mike Combs
----------------------------------------------------------------------
By all that you hold dear on this good Earth
I bid you stand, Men of the West!
                                                     Aragorn

Now, SpaceX is still struggling with theyr rocket, Ares is in
development problems...and yet those are a lot less ambitious than
what is suggested here something with 500 ton LEO capability.

It´s plans like these with everything assumed to go right that aren´t
believable.

I don't understand Ares. How is it that almost 40 years ago Armstrong
and Aldrin went to the Moon on top of a Saturn 5? In what respects is
Ares "better" than Saturn? Certainly not in $/Kg.

  - Ian Parker- Hide quoted text -

- Show quoted text -

Its a function of the amount of money spent and how wisely it is
spent.

I have given you my ideas here. Einar says they're not believable and
compares what I have proposed with something on a whole different
order - apples and oranges.

Saturn V cost $9 billion and 6 years to develop - using results of DOD
programs on the E1/F1 an J2 engines with 13 vehicles built and flown.

I propose taking an ET sized airframe propelled by an annular
aerospike engine, with an RS-68 pumpset (3) in each engine - to
produce a ET sized booster- stretched 40% - massing 1,000 tons at lift
off, creating 1,400 tons thrust at lift off - operating 7 at a time to
create a three stage operation to loft 500 tons to LEO. They will
have an advanced thermal protection system and be fully recoverable
with downrange tow planes picking up the pieces.

I estimate that this program will cost $6 billion to complete in 4
years and result in 4 vehicles that put 500 metric tons into orbit
each launch at a cost of $70 million ($10 million per element per
flight)

Why does this seem infeasible? What specifically is infeasible about
it?
.

Relevant Pages

  • Re: We can meet all our needs through space development
    ... Ares "better" than Saturn? ... Saturn V cost $9 billion and 6 years to develop - using results of DOD ... aerospike engine, with an RS-68 pumpset in each engine - to ... produce a ET sized booster- stretched 40% - massing 1,000 tons at lift ...
    (sci.space.policy)
  • Practical space travel and unlimited growth
    ... that flow is given by the cost of imparting that momentum. ... World shipping today is approximately 6.5 billion tons loaded each ... Obviously, beamed energy from ... solar sources in space to any user throughout the solar system ...
    (sci.space.policy)
  • Low Cost Hydrogen is here to stay
    ... fact 3.34 billion tons of hydrogen would displace ALL OTHER FUELS. ... At present the lowest cost way of making hydrogen is the shift ... TW of solar panels if the panels are located in a region that hs ...
    (sci.energy.hydrogen)
  • Re: Space-based power makes CNN.com - comments may be entertaining
    ... Once again the true birth to grave cost of your spaced ... based energy is only off by way of ten fold under what it'll actually ... Space solar power had certain advantages and disadvantages. ... billion and produces 425 million tons of hydrogen per year. ...
    (sci.space.policy)
  • Re: Heavy Lift Design for Mining/Cargo Propulsion
    ... The energy applied to a propellant determines how fast it can be made ... You can see that the pump power scales with the engine power. ... again off again operation lowers the thrust for a given thrust ... 60 million tons per ton ...
    (sci.space.policy)